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‘The mineral is found as small pink to gray masses of microcrystals in quartz-feldspar pegmatites and veins in association with astrophyllite, riebeckite, and zircon.’

‘Later in the week we enticed the government guys to take us to a locality called Kent, quite a drive from Karaganda, where in a beautiful setting we collected fluorite, riebeckite, and zircon from granite.’

‘Glaucophane and riebeckite are found in low-grade schists of basic igneous parentage; crocidolite occurs in medium-grade metamorphosed ironstones.’

‘On the other hand, there is evidence that long-term exposure to asbestiform riebeckite can be dangerous.’

Origin

Late 19th century: from the name of Emil Riebeck (died 1885), German explorer, + -ite.